scholarly journals Evaluation of Cyantraniliprole, Spinetoram, and Chromobacterium subtsugae Extract in Bait for Killing and Reducing Oviposition of Rhagoletis indifferens (Diptera: Tephritidae)

2020 ◽  
Vol 113 (3) ◽  
pp. 1356-1362
Author(s):  
Wee L Yee
Keyword(s):  
Yeast Extract ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Alternative Method ◽  
Potential Benefits ◽  
Rhagoletis Indifferens ◽  
Tephritid Fruit Flies ◽  
Significant Mortality

Abstract Insecticides mixed in sugar-protein baits or insecticides alone have been used to control tephritid fruit flies for many years. Here, effects of cyantraniliprole, spinetoram, and the biopesticide Chromobacterium subtsugae extract in sucrose-yeast extract bait or alone on kill and oviposition of western cherry fruit fly, Rhagoletis indifferens Curran (Diptera: Tephritidae), were evaluated in the laboratory. Flies were exposed to dry insecticide bait or insecticide alone in the presence or absence of a nontoxic food strip. Spinetoram alone caused greater mortality than cyantraniliprole alone, while cyantraniliprole in bait caused mortality as high as spinetoram bait and greater mortality than cyantraniliprole alone. Chromobacterium subtsugae extract alone but not in bait caused significant mortality compared with controls, but was much less effective than cyantraniliprole and spinetoram. Spinetoram alone reduced oviposition more than cyantraniliprole alone. However, cyantraniliprole bait reduced oviposition as much or more than spinetoram alone or spinetoram bait. Cyantraniliprole and spinetoram baits caused greater mortality when a nontoxic food strip was absent than present, but there was no corresponding reduction in oviposition. Chromobacterium subtsugae extract did not significantly reduce oviposition compared with controls. Potential benefits of using cyantraniliprole baits as an additional or alternative method to using more toxic spinosyn insecticides for controlling R. indifferens warrant study.

scholarly journals Host Suitability Index for Polyphagous Tephritid Fruit Flies

2021 ◽  
Author(s):  
Peter A Follett ◽  
Fay E M Haynes ◽  
Bernard C Dominiak
Keyword(s):  
Fruit Fly ◽  
Fruit Production ◽  
General Purpose ◽  
Fruit Flies ◽  
Host Suitability ◽  
Bactrocera Dorsalis ◽  
Infestation Rate ◽  
Suitability Index ◽  
Host Status ◽  
Tephritid Fruit Flies

Abstract Tephritid fruit flies are major economic pests for fruit production and are an impediment to international trade. Different host fruits are known to vary in their suitability for fruit flies to complete their life cycle. Currently, international regulatory standards that define the likely legal host status for tephritid fruit flies categorize fruits as a natural host, a conditional host, or a nonhost. For those fruits that are natural or conditional hosts, infestation rate can vary as a spectrum ranging from highly attractive fruits supporting large numbers of fruit flies to very poor hosts supporting low numbers. Here, we propose a Host Suitability Index (HSI), which divides the host status of natural and conditional hosts into five categories based on the log infestation rate (number of flies per kilogram of fruit) ranging from very poor (<0.1), poor (0.1–1.0), moderately good (1.0–10.0), good (10–100), and very good (>100). Infestation rates may be determined by field sampling or cage infestation studies. We illustrate the concept of this index using 21 papers that examine the host status of fruits in five species of polyphagous fruit flies in the Pacific region: Bactrocera tryoni Froggatt, Bactrocera dorsalis (Hendel), Bactrocera latifrons (Hendel), Zeugodacus cucurbitae (Coquillett), and Ceratitis capitata (Wiedemann) (Diptera: Tephritidae). This general-purpose index may be useful in developing systems approaches that rely on poor host status, for determining surveillance and detection protocols for potential incursions, and to guide the appropriate regulatory response during fruit fly outbreaks.

scholarly journals Establishing criteria for the management of tephritid fruit fly outbreaks

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Michael D. Ormsby
Keyword(s):  
Cost Benefit ◽  
Fruit Fly ◽  
Economic Benefits ◽  
Fruit Flies ◽  
International Standards ◽  
Trade Restrictions ◽  
Export Restriction ◽  
Fly Control ◽  
Financial Impacts ◽  
Tephritid Fruit Flies

AbstractTephritid fruit flies (Diptera; Tephritidae) represent a group of insects that include some of the most economically important pests in horticulture. Because of their economic importance, the financial impacts of an incursion of tephritid fruit flies into a new area can often result in restrictions to trade. The economic impacts of any trade restrictions imposed by importing countries are confounded by the current absence of consistent and accepted criteria for the strength and extent of any trade restrictions and declaring the end of an incursion. The author has developed models that can be used to establish criteria for the management of tephritid fruit fly outbreaks as outlined in international standards. A model enables criteria on when to recognise an incursion has occurred and establish export restrictions. Another model determines what area or radius an export restriction zone (ERZ) should cover. And a third model establishes criteria for the conditions required to enable an ERZ to be rescinded and the area’s pest free status reinstated. The models rely primarily on fruit fly biology and the effectiveness of surveillance trapping systems. The adoption of these proposed criteria internationally for establishing a control system and responding to fruit fly outbreaks would provide considerable economic benefits to international trade. Additionally, these criteria would enable countries to make more informed cost–benefit decisions on the level of investment in fruit fly control systems that better reflects the economic risks fruit flies represent to their economy.

scholarly journals Biological Control of Tephritid Fruit Flies in the Americas and Hawaii: A Review of the Use of Parasitoids and Predators

Insects ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 662
Author(s):  
Flávio R. M. Garcia ◽  
Sérgio M. Ovruski ◽  
Lorena Suárez ◽  
Jorge Cancino ◽  
Oscar E. Liburd
Keyword(s):  
Biological Control ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Economic Importance ◽  
Parasitoid Species ◽  
Control Programs ◽  
First Time ◽  
Tephritid Fruit Flies

Biological control has been the most commonly researched control tactic within fruit fly management programs. For the first time, a review is carried out covering parasitoids and predators of fruit flies (Tephritidae) from the Americas and Hawaii, presenting the main biological control programs in this region. In this work, 31 species of fruit flies of economic importance are considered in the genera Anastrepha (11), Rhagoletis (14), Bactrocera (4), Ceratitis (1), and Zeugodacus (1). In this study, a total of 79 parasitoid species of fruit flies of economic importance are listed and, from these, 50 are native and 29 are introduced. A total of 56 species of fruit fly predators occur in the Americas and Hawaii.

scholarly journals Modified Atmosphere Does Not Reduce the Efficacy of Phytosanitary Irradiation Doses Recommended for Tephritid Fruit Flies

Insects ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 371 ◽  
Author(s):  
Vanessa S. Dias ◽  
Guy J. Hallman ◽  
Olga Y. Martínez-Barrera ◽  
Nick V. Hurtado ◽  
Amanda A. S. Cardoso ◽  
...  
Keyword(s):  
Adult Emergence ◽  
Fruit Fly ◽  
Agricultural Trade ◽  
Fruit Flies ◽  
Bactrocera Dorsalis ◽  
Modified Atmosphere ◽  
Radiation Doses ◽  
Low Oxygen ◽  
Oxygen Levels ◽  
Tephritid Fruit Flies

Phytosanitary irradiation (PI) has been successfully used to disinfest fresh commodities and facilitate international agricultural trade. Critical aspects that may reduce PI efficacy must be considered to ensure the consistency and effectiveness of approved treatment schedules. One factor that can potentially reduce PI efficacy is irradiation under low oxygen conditions. This factor is particularly important because storage and packaging of horticultural commodities under low oxygen levels constitute practices widely used to preserve their quality and extend their shelf life. Hence, international organizations and regulatory agencies have considered the uncertainties regarding the efficacy of PI doses for insects infesting fresh commodities stored under low oxygen levels as a rationale for restricting PI application under modified atmosphere. Our research examines the extent to which low oxygen treatments can reduce the efficacy of phytosanitary irradiation for tephritids naturally infesting fruits. The effects of normoxia (21% O2), hypoxia (~5% O2), and severe hypoxia (< 0.5% O2) on radiation sensitivity of third instars of Anastrepha fraterculus (sensu lato), A. ludens (Loew), Bactrocera dorsalis (Hendel), and Ceratitis capitata (Wiedemann) were evaluated and compared at several gamma radiation doses. Our findings suggest that, compared to normoxia, hypoxic and severe-hypoxic conditioning before and during irradiation can increase adult emergence and contribute to advancement of larval development of tephritid fruit flies only at low radiation doses that are not used as phytosanitary treatments. With phytosanitary irradiation doses approved internationally for several tephritids, low oxygen treatments applied before and during irradiation did not increase the emergence rates of any fruit fly species evaluated, and all treated insects died as coarctate larvae. Thus, the findings of our research support a re-evaluation of restrictions related to phytosanitary irradiation application under modified atmospheres targeting tephritid fruit flies.

scholarly journals The Leukemic Fly: Promises and Challenges

Cells ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1737
Author(s):  
Amani Al Outa ◽  
Dana Abubaker ◽  
Joelle Madi ◽  
Rihab Nasr ◽  
Margret Shirinian
Keyword(s):  
Drug Screening ◽  
Fruit Fly ◽  
Fruit Flies ◽  
In Vivo Model ◽  
Lymphoid Leukemia ◽  
Mortality And Morbidity ◽  
Speed Up ◽  
Interesting Area ◽  
Significant Mortality

Leukemia involves different types of blood cancers, which lead to significant mortality and morbidity. Murine models of leukemia have been instrumental in understanding the biology of the disease and identifying therapeutics. However, such models are time consuming and expensive in high throughput genetic and drug screening. Drosophila melanogaster has emerged as an invaluable in vivo model for studying different diseases, including cancer. Fruit flies possess several hematopoietic processes and compartments that are in close resemblance to their mammalian counterparts. A number of studies succeeded in characterizing the fly’s response upon the expression of human leukemogenic proteins in hematopoietic and non-hematopoietic tissues. Moreover, some of these studies showed that these models are amenable to genetic screening. However, none were reported to be tested for drug screening. In this review, we describe the Drosophila hematopoietic system, briefly focusing on leukemic diseases in which fruit flies have been used. We discuss myeloid and lymphoid leukemia fruit fly models and we further highlight their roles for future therapeutic screening. In conclusion, fruit fly leukemia models constitute an interesting area which could speed up the process of integrating new therapeutics when complemented with mammalian models.

Newly imported larval parasitoids pose minimal competitive risk to extant egg–larval parasitoid of tephritid fruit flies in Hawaii

2002 ◽  
Vol 92 (5) ◽  
pp. 423-429 ◽  
Author(s):  
X.G. Wang ◽  
R.H. Messing
Keyword(s):  
Biological Control ◽  
Fruit Fly ◽  
Classical Biological Control ◽  
Fruit Flies ◽  
Fopius Arisanus ◽  
Larval Parasitoids ◽  
Larval Parasitoid ◽  
Fruit Fly Parasitoids ◽  
Psyttalia Concolor ◽  
Tephritid Fruit Flies

AbstractCompetitive displacement of fruit fly parasitoids has been a serious issue in the history of fruit fly biological control in Hawaii. This concern regarding competitive risk of new parasitoids has led to an overall tightening of regulations against the use of classical biological control to manage fruit flies. Fopius arisanus (Sonan), an egg–larval parasitoid, is the most effective natural enemy of tephritid fruit flies in Hawaii. This study evaluated the competitive risk of two recently introduced larval parasitoids, Diachasmimorpha kraussii Fullaway and Psyttalia concolor (Szépligeti), to F. arisanus attacking the Mediterranean fruit fly, Ceratitis capitata (Wiedemann). Fopius arisanus won almost all intrinsic competitions against both larval parasitoids through physiological suppression of egg development. 83.3% of D. kraussii eggs and 80.2% of P. concolor eggs were killed within three days in the presence of F. arisanus larvae within the bodies of multi-parasitized hosts. The mechanism that F. arisanus employs to eliminate both larval parasitoids is similar to that it uses against three other early established larval fruit fly parasitoids: F. vandenboschi (Fullaway), D. longicaudata (Ashmead) and D. tryoni (Cameron). It suggests that introduction of these larval parasitoids poses minimal competitive risk to F. arisanus in Hawaii.

Anastrephaegg deposition induces volatiles in fruits that attract the parasitoidFopius arisanus

2012 ◽  
Vol 103 (3) ◽  
pp. 318-325 ◽  
Author(s):  
J. Pérez ◽  
J.C. Rojas ◽  
P. Montoya ◽  
P. Liedo ◽  
A. Castillo
Keyword(s):  
Mechanical Damage ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Olfactory Cues ◽  
Host Discrimination ◽  
New Associations ◽  
Induced Volatiles ◽  
Egg Deposition ◽  
Parasitoid Attraction ◽  
Tephritid Fruit Flies

AbstractFopius arisanusis a solitary egg–pupal endoparasitoid that attacks several species of tephritid fruit flies, particularlyBactroceraspp. This species, indigenous from the Indo-Australian region, was introduced into Mexico for biological control purposes. From the standpoint of the ‘new associations’ concept this parasitoid has been evaluated against fruit flies in theAnastrephacomplex. We investigated the specificity ofF. arisanusresponses to fruits infested with two species ofAnastrepha. We examined whether fruit volatiles attractive to this parasitoid are induced as a result of fruit fly oviposition. We also investigated whetherF. arisanusfemales are able to discriminate between the oviposition-induced volatiles from host eggs parasitised by conspecifics and volatiles from unparasitised eggs. All experiments were performed in a wind tunnel. Results showed that mango fruits infested withA. ludenseggs (2–3 days after egg deposition) were significantly more attractive to naïveF. arisanusfemales compared with non-infested fruits or fruits infested with larvae. In addition, guava fruits harbouringA. striataeggs were significantly more attractive to the parasitoid than non-infested fruits or fruits infested with larvae. Thus, the parasitoid was attracted to fruits with eggs, but fruit and fly species did not influence the parasitoid attraction. We also found thatF. arisanusfemales were more attracted to fruits exposed to fertileA. ludensfemales (i.e. fruits with eggs inside) compared with fruits exposed to sterile females (i.e. fruits with no eggs inside) or fruits with mechanical damage. Parasitoid females were not attracted toA. ludenseggs. The results suggest that the presence of eggs induces volatiles that attract parasitoids. Finally, we found thatF. arisanuswas able to discriminate between fruits with unparasitised eggs vs. eggs parasitised by conspecifics, indicating that host discrimination could be mediated by olfactory cues.

scholarly journals Chemical Composition of Essential Oils from Leaves and Fruits of Juniperus foetidissima and Their Attractancy and Toxicity to Two Economically Important Tephritid Fruit Fly Species, Ceratitis capitata and Anastrepha suspensa

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7504
Author(s):  
Mehmet Kurtca ◽  
Ibrahim Tumen ◽  
Hasan Keskin ◽  
Nurhayat Tabanca ◽  
Xiangbing Yang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Ceratitis Capitata ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Chemical Components ◽  
Anastrepha Suspensa ◽  
Caribbean Fruit Fly ◽  
Tephritid Species ◽  
Tephritid Fruit Flies

The present study analyzed the chemical composition of Juniperus foetidissima Willd. essential oils (EOs) and evaluated their attractancy and toxicity to two agriculturally important tephritid fruit flies. The composition of hydrodistilled EOs obtained from leaves (JFLEO) and fruits (JFFEO) of J. foetidissima was analyzed by GC–FID and GC–MS. The main compounds were α-pinene (45%) and cedrol (18%) in the JFLEO and α-pinene (42%), α-thujone (12%), and β-thujone (25%) in the JFFEO. In behavioral bioassays of the male Mediterranean fruit fly, Ceratitis capitata (Wiedemann), both JFLEO and JFFEO showed strong attraction comparable to that observed with two positive controls, Melaleuca alternifolia and Tetradenia riparia EOs. In topical bioassays of the female Caribbean fruit fly, Anastrepha suspensa (Loew), the toxicity of JFFEO was two-fold higher than that of JFLEO, with the LD50 values being 10.46 and 22.07 µg/µL, respectively. This could be due to differences in chemical components between JFLEO and JFFEO. The JFFEO was dominated by 48% monoterpene hydrocarbons (MH) and 46% oxygenated monoterpenes (OM), while JFLEO consisted of 57% MH, 18% OM, and 20% oxygenated sesquiterpenes (OS). This is the first study to evaluate the attractancy and toxicity of J. foetidissima EOs to tephritid fruit flies. Our results indicate that JFFEO has the potential for application to the management of pest tephritid species, and further investigation is warranted.

scholarly journals Systematic Modification of Zingerone Reveals Structural Requirements for Attraction of Jarvis’s Fruit Fly

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Benjamin L. Hanssen ◽  
Soo Jean Park ◽  
Jane E. Royer ◽  
Joanne F. Jamie ◽  
Phillip W. Taylor ◽  
...  
Keyword(s):  
Fruit Fly ◽  
Field Trials ◽  
Fruit Flies ◽  
Monitoring And Control ◽  
Structural Modifications ◽  
Phenolic Esters ◽  
Key Sites ◽  
And Control ◽  
Future Work ◽  
Tephritid Fruit Flies

AbstractTephritid fruit flies are amongst the most significant horticultural pests globally and male chemical lures are important for monitoring and control. Zingerone has emerged as a unique male fruit fly lure that can attract dacine fruit flies that are weakly or non-responsive to methyl eugenol and cuelure. However, the key features of zingerone that mediate this attraction are unknown. As Jarvis’s fruit fly, Bactrocera jarvisi (Tryon), is strongly attracted to zingerone, we evaluated the response of B. jarvisi to 37 zingerone analogues in a series of field trials to elucidate the functional groups involved in attraction. The most attractive analogues were alkoxy derivatives, with isopropoxy being the most attractive, followed by ethoxy and trifluoromethoxy analogues. All of the phenolic esters tested were also attractive with the response typically decreasing with increasing size of the ester. Results indicate that the carbonyl group, methoxy group, and phenol of zingerone are key sites for the attraction of B. jarvisi and identify some constraints on the range of structural modifications that can be made to zingerone without compromising attraction. These findings are important for future work in developing and optimising novel male chemical lures for fruit flies.

Zero catch criteria for declaring eradication of tephritid fruit flies: the probabilities

2005 ◽  
Vol 45 (10) ◽  
pp. 1335 ◽  
Author(s):  
A. Meats ◽  
A. D. Clift
Keyword(s):  
Exotic Species ◽  
Fruit Fly ◽  
Local Area ◽  
Fruit Flies ◽  
Trapping Rate ◽  
Model Calculations ◽  
Actual Density ◽  
Eradication Campaign ◽  
Tephritid Fruit Flies

We examine procedures for declaring an area free of pest fruit flies following an eradication campaign. To date, the acceptable period of trapping zero flies has been calculated without an estimate of the probability of being wrong. The zero trapping periods are usually shorter when declaring local ‘area freedom’ from an endemic fly, than when claiming eradication of an exotic species. We use a model to calculate the probability of zero trap captures and therefore the probability of trapping further flies. The latter probability is always finite. A zero trapping result does not indicate the absence of flies. There must also be evidence of what constitutes a non-viable density, as indicated by the trapping rate. The non-viable densities of certain pest fruit fly species are known from decades of managing small incursions in fly-free zones. There is no need for implementation of eradication procedures if the trapping rate is sufficiently low, in these areas. For a given density of flies (defined in terms of expected mean catch per trap per week), the probability of zero trap captures reduces with time and the number of traps employed. If the model calculations use a non-sustainable density (inferred from trapping rate) then we may declare the actual density of flies to be less if the trapping result is zero for a given number of weeks with a given number of traps when the model predicts the probability of such a result to be sufficiently low, according to a criterion that is selected at a level suited to the purpose of the declaration.

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